Traits

Traits linked to TPM1

tropomyosin 1

The Human Phenotype Ontology links 21 traits to TPM1, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of the cardiovascular system

Trait	How often it is seen
Left ventricular noncompaction cardiomyopathy	Very often (80–99%)
Left ventricular systolic dysfunction	Very often (80–99%)
Stretched and thinned heart muscle	Very often (80–99%)
Abnormal heart rate	Often (30–79%)
Cardiac failure	Often (30–79%)
Ebstein anomaly of the tricuspid valve	Often (30–79%)
Increased left ventricular end-diastolic volume	Often (30–79%)
Sudden cardiac death	Often (30–79%)
Mitral regurgitation	Sometimes (5–29%)
Quivering upper heart chambers resulting in irregular heartbeat	Sometimes (5–29%)
Ventricular tachycardia	Sometimes (5–29%)
Enlarged and thickened heart muscle	Not recorded

Abnormality of the musculoskeletal system

Trait	How often it is seen
EMG abnormality	Sometimes (5–29%)
Loss of fat tissue in localized area	Sometimes (5–29%)
Muscle tissue disease	Sometimes (5–29%)

Abnormality of the respiratory system

Trait	How often it is seen
Exertional breathlessness	Often (30–79%)
Orthopnea	Often (30–79%)

Abnormality of blood and blood-forming tissues

Trait	How often it is seen
Thromboembolic stroke	Sometimes (5–29%)

Abnormality of the ear

Trait	How often it is seen
Sensorineural hearing impairment	Sometimes (5–29%)

Constitutional symptom

Trait	How often it is seen
Fatigue	Often (30–79%)

Laboratory abnormality

Trait	How often it is seen
Fluid retention	Often (30–79%)

How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.

Where this comes from

The Human Phenotype Ontology, release 2026-09-01: the traits linked to TPM1 and how often each is seen. Find out more at hpo.jax.org.

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